Self-Assembled Organic Monolayers Terminated in Perfluoroalkyl Pentafluoro-λ6-sulfanyl (-SF5) Chemistry on Gold
作者： R. Winter , P. G. Nixon , G. L. Gard , D. J. Graham , D. G. Castner
DOI: 10.1021/LA040011W
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摘要: Recently synthesized (Winter, R.; Nixon, P. G.; Gard, G. L.; Radford, D. H.; Holcomb, N. Grainger, W. J. Fluorine Chem. 2001, 107, 23−30) SF5-terminated perfluoroalkyl thiols (SF5(CF2)nCH2CH2SH, where n = 2, 4, and 6) a symmetric dialkyl disulfide ([SF5−CHCH−(CH2)8−S−]2) were assembled as thin films chemisorbed onto gold surfaces. The adsorbed monolayer of these SF5-containing molecules on polycrystalline compared using ellipsometry, contact angle, X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry (ToF-SIMS), infrared (FTIR) surface analytical methods. resulting SF5-dialkyl film shows moderate angle dependence in depth-dependent XPS analysis, suggesting preferentially oriented film. exhibit angular-dependent compositional variance depending chain length, consistent with improved assembly (increasingly hydrophobic, fewe...
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